Are default mysql parameters in RDS sane?

Question

RDS uses the same set of parameters for all instance sizes and they don't seem to be that far from defaults (max_packet_size being too small etc.)

Has anyone looked at them and reviewed them for how sensible they are, especially on relatively bigger instances?

Answer 1

The default buffer size for MyISAM is too small in RDS parameter group, I have made changes of that, make significant improvement in read/write performance. However, just beware, not all MySQL parameters are honored by RDS, only those ones shown in parameter group.

Answer 2

you can always change the parameter set to fit your application.